I think alot of guys feel guilty because somehow they believe it's not oky to have this much fun. But, it really is . It's okay, it's normal. it's supposed to feel that good so that we're all good creatures and procreate alot. The orgsm is the reward for that!

It's not something bad or dangerous like an addiction, or something weird like a 'mental thing' As long as it doesn't get in the way of other parts of life.